DataScience+ We publish R tutorials from scientists at academic and scientific institutions with a goal to give everyone in the world access to a free knowledge. Our tutorials cover different topics including statistics, data manipulation and visualization!
Author

Margot Tollefson

Dr. Tollefson is a consulting statistician, specializing in the analysis of count data, survey sampling, and time series. She earned her PhD and MS in statistics from Iowa State University, her BA in physics from Reed College, and she has also taken many courses in economics.